EXOD532 In a Jewish marriage, over and above the question procreation, there exists the conjugal rights of the wife, technically termed onah. Thus, non-procreative intercourse such as occurs if the wife is too young to bear children, or is barren, or is pregnant, or post- menopausal, or following a hysterectomy, is not only allowed but required. Improper emission of seed (hashhatat zara) is not involved or is canceled out so long as the intercourse is in the manner of procreation. Not only are such sexual activities permitted, but they are in fact required by Biblical law based on [this verse]. "Marriage and marital relations are both independent of procreation, achieving the many desiderata spoken of in Talmudic, responsa, and mystic literatures." (Feldman, D. Birth Control in Jewish Law, 1968, New York Univ. Press, 322 pp.) Such goals include fulfilling the wife's desire, physical release of the husband's sexual pressures, and the maintenance of marital harmony and domestic peace. A lengthy chapter in Feldman's book is devoted to a discussion of the legitimacy of sexual pleasure in Judaism. He quotes Nahmanidies who said that "Sexual intercourse is holy and pure when carried on properly, in the proper time and with the proper intentions. No one should claim that it is ugly or unseemly. God forbid! ..." In a similar vein, Rabbi Jacob Emden is cited as having said: "... To us the sexual act is worthy, good and beneficial even to the soul. No other human activity compares with it; when performed with pure and clean intention it is certainly holy. There is nothing impure or defective about it, rather much exaltation..." Thus, whereas Christian teaching promulgates that procreation is the sole purpose of marriage and sexual intercourse, Judaism requires that not only need procreation result from sex, but mutual pleasure is sufficient reason for the sex act.